// Copyright 2004-2011 Castle Project - http://www.castleproject.org/
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Castle.MonoRail.ActiveRecordSupport
{
	using Castle.ActiveRecord.Framework.Internal;


	public sealed class ARCommonUtils
	{
		public static PrimaryKeyModel ObtainPKProperty(ActiveRecordModel model)
		{
			if (model == null) return null;

			var curModel = model;

			while (curModel != null)
			{
				if (curModel.PrimaryKey != null)
				{
					return curModel.PrimaryKey;
				}

				curModel = curModel.Parent;
			}

			return null;
		}	
	}
}
